// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_BROWSER_WEBUI_WEB_UI_CONTROLLER_FACTORY_REGISTRY_H_
#define CONTENT_BROWSER_WEBUI_WEB_UI_CONTROLLER_FACTORY_REGISTRY_H_

#include "base/macros.h"
#include "base/memory/singleton.h"
#include "content/public/browser/web_ui_controller_factory.h"

namespace content {

// A singleton which holds on to all the registered WebUIControllerFactory
// instances.
class CONTENT_EXPORT WebUIControllerFactoryRegistry
    : public WebUIControllerFactory {
public:
    static WebUIControllerFactoryRegistry* GetInstance();

    // WebUIControllerFactory implementation. Each method loops through the same
    // method on all the factories.
    WebUIController* CreateWebUIControllerForURL(WebUI* web_ui,
        const GURL& url) const override;
    WebUI::TypeID GetWebUIType(BrowserContext* browser_context,
        const GURL& url) const override;
    bool UseWebUIForURL(BrowserContext* browser_context,
        const GURL& url) const override;
    bool UseWebUIBindingsForURL(BrowserContext* browser_context,
        const GURL& url) const override;

    // Returns true if the given URL can be loaded by Web UI system. This allows
    // URLs that UseWebUIForURL returns true for, and also URLs that can be loaded
    // by normal tabs such as javascript: URLs or about:hang.
    bool IsURLAcceptableForWebUI(BrowserContext* browser_context,
        const GURL& url) const;

private:
    friend struct base::DefaultSingletonTraits<WebUIControllerFactoryRegistry>;

    WebUIControllerFactoryRegistry();
    ~WebUIControllerFactoryRegistry() override;

    DISALLOW_COPY_AND_ASSIGN(WebUIControllerFactoryRegistry);
};

} // namespace content

#endif // CONTENT_BROWSER_WEBUI_WEB_UI_CONTROLLER_FACTORY_REGISTRY_H_
